Triangle of dim star-like lights on object(s) travelling silently at high speed NNE to SSW in Vancouver,BC.

Looking north from Fraser St. & 57th(49deg 13'06"N 123deg 05'28"W);I saw (against a clear sky) a patch of light approaching my position. It approached rapidly directly overhead and then continued by heading toward the east end of the Vancouver airport. It flew by so quickly that all I could see was a triangle composed of about 5 or more dim (average star brightness) bluish-white lights around its edge. I saw nothing other than lights. The apparent size was about like a 747 (judged by watching its apparent speed and angle receeding toward the airport). There was no sound at all. I estimated its altitude at 1000'. After it flew over the airport approach path it became too dim to see, then a plane (landing) flew a few hundred feet below it 10 seconds later. I think it's important to consider the source of info; so I should point out that I majored in sciences through college, and and not prone to fantasy (unless this is my first?).